Split out ControlPoints into more specific types
Read menu music from osz resource
Tidy ups
Implement mania note input
# Conflicts: # osu.Game.Rulesets.Mania/UI/Column.cs
Add beat syncing container
Mania hitobject object conversion
Abstract out SectionsContainer from Settings
Add basic framework required to implement mania note input
Thanks to the order of adding to parent container, the depth value is actually not needed.